Updated March 26, 2026· Based on independent benchmark data
GLM-5 (Reasoning) leads in intelligence with a score of 49.8 vs 44.6. For speed, GPT-5 Codex (high) wins at 180 tok/s vs 66 tok/s.
| Metric | GLM-5 (Reasoning) | GPT-5 Codex (high) |
|---|---|---|
| Intelligence Score | 49.8 | 44.6 |
| Coding Score | 44.2 | 38.9 |
| Math Score | N/A | 98.7 |
| Speed (tok/s) | 66 tok/s | 180 tok/s |
| Latency (TTFT) | 0.98s | 9.17s |
| Input Price / 1M tokens | $1.00 | $1.25 |
| Output Price / 1M tokens | $3.20 | $10 |
| Context Window | N/A |
GLM-5 (Reasoning) outperforms GPT-5 Codex (high) on the intelligence index with a score of 49.8 compared to 44.6. For coding tasks, GLM-5 (Reasoning) has the edge with a coding score of 44.2 vs 38.9.
GPT-5 Codex (high) generates output significantly faster at 180 tok/s compared to GLM-5 (Reasoning)'s 66 tok/s, making it 2.7x faster for streaming responses. Time to first token is 0.98s for GLM-5 (Reasoning) vs 9.17s for GPT-5 Codex (high), which affects perceived responsiveness in interactive applications.
GLM-5 (Reasoning) is more affordable at $1.00/1M input tokens ($3.20/1M output), while GPT-5 Codex (high) costs $1.25/1M input ($10/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, GLM-5 (Reasoning) would cost approximately $6.00/month vs $7.50/month for GPT-5 Codex (high) in input costs alone.
Choose GLM-5 (Reasoning) when you need higher intelligence (49.8), stronger coding performance (44.2). Choose GPT-5 Codex (high) when you need faster output (180 tok/s).
GLM-5 (Reasoning) scores higher on coding benchmarks (44.2 vs 38.9), making it the better choice for programming tasks.
GLM-5 (Reasoning) is cheaper at $1.00/1M input tokens vs $1.25/1M for GPT-5 Codex (high).
GPT-5 Codex (high) is faster, producing output at 180 tok/s compared to GLM-5 (Reasoning)'s 66 tok/s.
No, GLM-5 (Reasoning) does not support image input. Neither model supports image input.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
It depends on your priorities. GLM-5 (Reasoning) scores higher on intelligence (49.8), but GPT-5 Codex (high) may be better for specific use cases like budget-conscious projects or speed-critical applications.